<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <link rel='stylesheet' href="./css/index.css"/>
</head>
<body>
    <p>好好学习，天天向上，我是 index.html</p>
    <div class="M-upload">
        <div class="M-uploadBtn">
            <input type="file" onChange="changeValue(event)"/>
        </div>
        <div class="mask">+</div>
    </div>
    <script type="text/javascript" src="./js/index.js"></script>
</body>
</html>